What does the internal superior laryngeal nerve innervate?
The superior laryngeal nerve, a branch of the vagus nerve, innervates the cricothyroid muscle of the larynx. This muscle stretches, tenses, and adducts the vocal cord. Superior laryngeal neuralgia usually appears as a postsurgical complication.
Which muscle is innervated by the superior laryngeal branch?
The superior laryngeal branch of the vagus nerve originates from the 4th pharyngeal arch along with the cricothyroid muscle. This developmental pattern elucidates why the cricothyroid muscle is the only muscle that receives innervation via the superior laryngeal nerve.
How many superior laryngeal nerves are there?
The superior laryngeal nerve consists of two branches: the internal laryngeal nerve (sensory), which supplies sensory fibers to the laryngeal mucosa, and the external laryngeal nerve (motor), which innervates the cricothyroid muscle….
| Superior laryngeal nerve | |
|---|---|
| TA2 | 6339 |
| FMA | 6239 |
| Anatomical terms of neuroanatomy |
What does the superior laryngeal nerve control?
The superior laryngeal nerve is involved in speech as well as protecting your airway from food and drink when you swallow. It branches off from the vagus nerve and then divides into two major branches, one sensory (gathering information from your senses) and one motor (involved in movement).
What does superior laryngeal artery supply?
The superior laryngeal artery accompanies the internal laryngeal branch of the superior laryngeal nerve, beneath the thyrohyoid muscle. It pierces the thyrohyoid membrane, and supplies the muscles, mucous membrane, and glands of the larynx, anastomosing with the branch from the opposite side.
What nerve innervates the laryngeal mucosa?
The internal laryngeal nerve supplies sensation to the mucosa from the epiglottis to just above the level of the vocal folds. (The recurrent laryngeal nerve supplies sensation from the rest of the larynx below the level of the vocal folds). It pierces the thyrohyoid membrane above the superior laryngeal artery.
What pierces through the thyrohyoid membrane?
The superior laryngeal artery is a branch of the superior thyroid artery near its bifurcation from the external carotid artery. It enters the larynx with the internal branch of the superior laryngeal nerve through the aperture of the thyrohyoid membrane.
What is the cricothyroid innervated by?
superior laryngeal nerve
The classical understanding of the anatomy is that the cricothyroid muscle (CTM) is innervated solely by the external branch of the superior laryngeal nerve (EBSLN), and the endolaryngeal muscles are covered only by the recurrent laryngeal nerve (RLN).
What Innervates the cricothyroid?
The classical understanding of the anatomy is that the cricothyroid muscle (CTM) is innervated solely by the external branch of the superior laryngeal nerve (EBSLN), and the endolaryngeal muscles are covered only by the recurrent laryngeal nerve (RLN).
What nerve Innervates trachea?
The trachea receives innervation from the pulmonary plexus. Parasympathetic supply originates from the recurrent laryngeal nerves, branches of the vagus nerve. Sympathetic supply is provided by the sympathetic trunks.
What artery pierces thyrohyoid membrane?
What Innervates thyrohyoid membrane?
Innervation. The thyrohyoid muscles are innervated by a branch of the ventral ramus of C1 from the cervical plexus, which courses with the hypoglossal nerve.
Is the superior laryngeal nerve a vagus nerve branch?
The superior laryngeal nerve is a branch of the vagus nerve. It arises from the middle of the inferior ganglion of vagus nerve and in its course receives a branch from the superior cervical ganglion of the sympathetic nervous system. The cricothyroid muscles are innervated by the superior laryngeal nerve.
Which is part of the laryngeal nerve innervates the muscles?
All other intrinsic laryngeal muscles are innervated by the recurrent laryngeal nerve. The superior laryngeal nerve consists of two branches: the internal laryngeal nerve (sensory), which supplies sensory fibers to the laryngeal mucosa, and the external laryngeal nerve (motor), which innervates the cricothyroid muscle.
How does the superior laryngeal nerve affect the voice?
The vocal fold itself receives dual innervation from both nerves. The superior laryngeal nerve innervates the two cricothyroid muscles. A superior laryngeal nerve palsy changes the pitch of the voice and causes an inability to make explosive sounds due to paralysis of the cricothyroid muscle.
Is the recurrent laryngeal nerve in the pharyngeal arch?
The recurrent laryngeal nerves are the nerves of the sixth pharyngeal arch. The existence of the recurrent laryngeal nerve was first documented by the physician Galen.